Go is a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.

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4
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20 views

Gin web framework middleware

As a beginner in Go, I'm seeking feedback on a web framework middleware I wrote up. I reckon that knowledge of the web framework is not needed for the code review. The goal of this middleware is ...
2
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0answers
8 views

Test web application

I am writing a test web application in Golang. Create post handler: ...
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0answers
11 views

Generic JWT Handler

I'm developing a Go REST service that uses JWT (JSON Web Tokens) for authentication. I've written a JWTHandler which validates the token using a Validation Handler. If validation succeeds, the ...
8
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0answers
66 views

Concurrency interview

A little while back I had an interview where they posed a problem, in summary: Watch a certain directory, and process incoming JSON files These JSON files have various "Type" fields Every second ...
4
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0answers
31 views

Bayesian spam filter interface

In essence, what I'm looking to do is split a string into one-word and two-word segments, and train classifiers against them. First it lowercasifies the string, then strips all non-alphanumeric ...
2
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1answer
35 views

Using goroutines to bruteforce a secret code

For a puzzle I had to brute force a password. I've never used goroutines before, and I don't have much experience in concurrency. This is the cksum function, which takes an array of the ASCII code ...
3
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0answers
21 views

Project Euler #2 in Go

I just learned Go (yesterday in fact) and today I made this solution to Project Euler #2. The problem is to sum the even Fibonacci numbers. My program uses the matrix representation of the linear ...
3
votes
0answers
34 views

Golang A* Pathfinder

This is a generalized A* pathfinder in Go. I am new to the language and am eager for advice about best practices. In particular, I am not sure if the type assertion I make in ...
1
vote
0answers
31 views

Calculate total width of a range of numbers

I'm mostly curious if there's a faster or more efficient algorithm I could use. I created this for a unique side project, as well as for an issue at work, so what the function does (e.g., return a ...
7
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0answers
62 views

Go Fish game written in Go

A couple months back I made a go fish game in Go, just for the sake of that pun. It was pretty poorly done and made experienced Go-ers cry when they looked at it. I rewrote some of it to be more ...
3
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0answers
58 views

Equivalent binary trees (A Tour of Go)

Any suggestions on how to improve the code shown below for the Go-tour exercise? Exercise description: There can be many different binary trees with the same sequence of values stored at the ...
0
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0answers
57 views

HTTP handlers exercise (tour of go)

Any suggestions on how to improve the code shown below for the go-tour exercise http://tour.golang.org/methods/14? Exercise description: Implement the following types and define ServeHTTP methods on ...
1
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1answer
31 views

Injecting an object in each function in Go

My current project uses a database represented as object. Furthermore I want to implement methods like CreateUser(), ...
2
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0answers
43 views

Restful API for parsing records

I'm trying to implement my own API. This code excerpt should show the basic working routines. The storage is temporary an in-memory-array and the only HTTP method for now is POST. I outsourced the ...
8
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2answers
839 views

Checking for any character common to two strings — Go is 50× slower than Python

I decided to learn Go, knowing Python. My approach is by solving easy problems like this one: You are given two strings, A and B. Find if there is a substring that appears in both A and B. ...
12
votes
2answers
134 views

A closer look at the chat's mumblings

The Go Playground was boring so I decided to make a small application that throws me into the language. It basically queries the chatroom every second for new messages and displays them in the output ...
1
vote
1answer
81 views

Natural mergesort

This is a problem from Robert Sedgwick's Algorithms book: Write a version of bottom-up mergesort that takes advantage of order in the array by proceeding as follows each time it needs to find two ...
2
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0answers
86 views

Nuts and bolts algorithm

I am trying to learn golang. This is a problem from Robert Sedgewick's Algorithm's book: You have a mixed pile of N nuts and N bolts and need to quickly find the corresponding pairs of nuts ...
0
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2answers
29 views

Binary tree isSame()

Please help me review this code. I want to make it both accurate and more Go-styled. Go Playground code ...
12
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0answers
104 views

Utility that decodes and logs UDP packets

I have written the following utility, as my first non-tutorial program in Go. The purpose of the utility is to connect to a torque/force sensor (aka load-cell) via UDP; to send an initialization ...
3
votes
1answer
37 views

Reverse Polish Calculator in Go

I'm very new to Go (this is my first real program), and I was hoping to see if there was anything I was missing about the language or any ways to make it more idiomatic. calculator.go ...
5
votes
2answers
81 views

Getting rid of goto without duplication in Go

Consider the following function: ...
2
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3answers
58 views

Pythagorean Triple Generator

I'm just playing about with Go, and am trying to solve some project euler problems to get used to it. I've created a generator function for Pythagorean triples, using a channel which returns a set of ...
3
votes
0answers
35 views

Reading from and writing to a file without passing around filename

I was looking for a way to write to and then read from a file in different parts of my code, without passing the filename around and without consumers needing to know it was coming from a file. I ...
2
votes
0answers
25 views

Most efficient way to remove specific items from a slice

Given a slice of unknown length (potentially very small or very large), and another slice containing (unique) integers indicating indices to be removed from that slice, the most straight forward way ...
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0answers
138 views

Binary heap implementation in Golang

I have implemented a binary heap in Go to get familiar with the language. GitHub ...
3
votes
1answer
231 views

Golang async but sequential enqueue with buffered channel

The objective of this program is to call enqueue sequentially with multiple URLs, and never block, fetching the URLs asynchronously, but on the order they were entered. In other words: keep calling ...
4
votes
1answer
684 views

Remove element slice of struct pointers

I have an application with a recent addition that requires the removal of a struct pointer from a slice that is itself an element of another struct. A summary of the usage. I am wondering if this is ...
5
votes
2answers
86 views

Return results from goroutines

I have two goroutines that each need to return their results to the main function. These results are of different types. I have implemented a solution that uses a structure that holds these results. ...
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votes
0answers
38 views

ttyname() implemented in Go

I'm rewriting GNU's coreutils in Go in order to learn Go better. I've implemented ttyname(3), and I'm looking for a general critique. I can't think of anything in particular I think I did poorly on. ...
3
votes
1answer
42 views

Walking and comparing contents of binary trees

I've written a solution for http://tour.golang.org/concurrency/8, which asks for a Walk() function to traverse a randomly generated binary tree, and a ...
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vote
0answers
626 views

Golang concurrent HTTP request

I wanted to test the performance of concurrent http request in Go against node.js: ...
3
votes
1answer
53 views

Fast power in Go

I just started learning Go. To start playing with it, I've implemented the fast power algorithm: Any suggestions or criticisms regarding the coding style? ...
2
votes
0answers
36 views

Basic Binary Tree in Go

As an exercise I have written a basic binary tree implementation in Go. Tree struct: ...
3
votes
0answers
122 views

Is this minimal Go cookie authentication system safe?

I'm working on a login system in Go (Golang). Previously, I was using Gorilla Sessions for this, but I wanted to see if I could reinvent the wheel and make it simpler. Also, I don't need to store ...
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0answers
21 views

Filesystem-dependant unit-testing in go

I recently rewrote a piece of software to practice unit-testing. I decided to constrain myself and do dependency-free code, so I can do better and easier tests. I came to the following solution while ...
3
votes
1answer
93 views

Convert int64 to custom base64 number string

I want to convert int64 to custom base 64 number string, with this specification: ...
5
votes
1answer
70 views

Number database using binary trees

I recently got interested in Go and wrote a database server which uses a binary tree for data storage for fun. As I have no prior experience in Go, I'd like to gather a bit feedback on my code and ...
2
votes
0answers
38 views

Parsing CSVs for bulk database insertions

I'm writing this as (eventually) part of a larger program. This will serve as the bulk data insertion from .csv files we parse. I'm primarily looking for parts that are breaking Go's formatting, ...
14
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1answer
307 views

Go Go Gadget Web Crawler

In A Tour of Go, you are given the following problem: In this exercise you'll use Go's concurrency features to parallelize a web crawler. Modify the ...
2
votes
0answers
49 views

Is this web service synchronized correctly?

I'm new to both concurrency programming and Go. I've written a small server side script that gets the title and ratings of a book for a given ISBN. I've to optimise performance by using a cache and ...
4
votes
1answer
696 views

Unmarshaling dynamic JSON

I have JSON object response returned from the server which is similar to this one: ...
3
votes
1answer
50 views

Command line flags & sorting algorithms

I've made my first-ever program in Go, which sorts a given input of integers. There are 2 options: The list of unsorted integers and the algorithm to use. Since it's my first go project I'm a bit ...
4
votes
1answer
287 views

Merge sort in Golang

I am just starting out with golang. I implemented the merge sort algorithm just to practice. Any suggestions or criticisms regarding the coding style? ...
7
votes
2answers
177 views

Subnetting calculator in Go

Whenever I try to learn a new language, I write a subnetting calculator. Here's my attempt with Go. In particular, I think I'm not writing idiomatic Go, as well as abusing ...
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vote
0answers
35 views

Daisychain channels

I watch the presentation about concurrent programming presented by Rob Pike and I saw the daisychain example. I tried to rewrite this code to make it more readable. Everything went well, but I am ...
7
votes
1answer
1k views

Golang HTTP status checker

I'm writing my first somewhat production ready (or not) Go program and could do with some feedback from someone more experienced with go. The code reads a list of URLs from a JSON file and then makes ...
4
votes
1answer
746 views

Graph (adjacency list) for BFS and DFS in Golang

I am trying to implement a Graph data structure in Golang and choose to use adjacency list representation. When starting to implement adjacency list, I have an idea ...
4
votes
1answer
97 views

Channels vs. “for loop” prime number generator

I've found a question on SO (here), which is a prime number generator that uses channels. First of all, I had some trouble to find out how this code works, but later on, I saw the fun of it. Then, all ...
4
votes
0answers
52 views

Reading OS X file tags

I'm investigating Go for use in our internal network / office project management system, and need a way to check and edit the color tags that you can set in Finder on files or folders (extended ...